CN209746173U - Fingerprint structure in a poor light under screen - Google Patents
Fingerprint structure in a poor light under screen Download PDFInfo
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- CN209746173U CN209746173U CN201920666293.5U CN201920666293U CN209746173U CN 209746173 U CN209746173 U CN 209746173U CN 201920666293 U CN201920666293 U CN 201920666293U CN 209746173 U CN209746173 U CN 209746173U
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Abstract
The utility model relates to a fingerprint structure in a poor light under screen, include by lower reflective membrane, light guide plate, diffusion barrier and the membrane that adds lustre to of supreme range upon range of setting, the membrane that adds lustre to is equipped with the microstructure face, the wave peak portion and the trough portion that the microstructure face set up including the interval, at least one in wave peak portion and the trough portion forms into the plane parallel with the horizontal direction. The utility model discloses a set up the microstructure face at the membrane that adds lustre to, at least one of the crest of wave portion and the trough of wave portion of microstructure face sets up to the plane parallel with the aspect of the level for the infrared ray can directly pierce through and do not take place the refraction from this plane when the membrane that adds lustre to, thereby ensures that the infrared light direction of this part does not change, improves fingerprint imaging quality.
Description
Technical Field
The utility model relates to a technical field is shaded particularly, relates to a structure is shaded to fingerprint under screen.
Background
Along with the rise of the full screen mobile phone, an additional fingerprint identification module is not arranged outside the screen, and the function of the fingerprint identification module is realized by touching the screen with the mobile phone, which is a future trend. At present, most of all-screen mobile phones adopt OLED screens, and by utilizing the self-luminous characteristic of the OLED, light rays penetrate through a glass cover plate and then are reflected after meeting finger fingerprints, and are received and identified by a receiving and identifying module below the screens.
The cost of the OLED screen is high, and how to realize the fingerprint identification function on the LCD screen with low cost is an urgent problem to be solved. The existing fingerprint unlocking technology generally uses infrared sensing fingerprints, and the working principle of the technology is that infrared light is emitted from a light source, irradiates the fingerprints and then is reflected to an infrared receiver below a backlight. When infrared reflection light passes through each film layer, the direction of partial light rays is ensured not to be changed, and the more the partial light rays are, the higher the fingerprint imaging quality is. Because the structure of the LCD screen includes a reflective film, a light guide plate, a diffusion film, a brightness enhancement film and a glass cover plate which are stacked from bottom to top, the structure of the brightness enhancement film requires light to be refracted therein, which causes the direction of infrared rays to change when the infrared rays pass through, thereby affecting the fingerprint imaging quality.
Disclosure of Invention
An object of the utility model is to provide a fingerprint structure in a poor light under screen both can satisfy normal light transmission requirement in a poor light, can ensure again that partial infrared light direction does not change, improves fingerprint imaging quality.
The utility model provides a fingerprint structure in a poor light under screen, includes by lower to last range upon range of reflectance coating, light guide plate, diffusion barrier and the membrane that adds lustre to that sets up, the membrane that adds lustre to is equipped with the microstructural face, the microstructural face includes crest portion and trough portion that the interval set up, at least one in crest portion and the trough portion forms the plane parallel with the horizontal direction.
In one embodiment, the peak portion is formed as a plane parallel to the horizontal direction, and the valley portion is formed as a tooth-like groove having an included angle.
Furthermore, the included angle of the wave trough part is 60-120 degrees.
As another embodiment, the valley portions are formed as planes parallel to the horizontal direction, and the peak portions are formed as tooth-like projections having an included angle.
Furthermore, the included angle of the crest portion is 60-120 degrees.
In another embodiment, the crest and the trough are both formed as planes parallel to the horizontal direction, and a connection surface is arranged between the crest and the trough and is formed as an inclined surface forming an included angle with the horizontal direction.
Furthermore, the reflecting film, the light guide plate, the diffusion film and the brightness enhancement film are all made of materials with high infrared penetration rate.
Compared with the prior art, the beneficial effects of the utility model are that: the light enhancement film is provided with the microstructure surface, and at least one of the wave crest part and the wave trough part of the microstructure surface is arranged to be a plane parallel to the horizontal direction, so that infrared rays can directly penetrate through the plane without refraction when passing through the light enhancement film, the direction of the infrared rays at the part is ensured not to be changed, and the fingerprint imaging quality is improved. And the inclined plane structure between crest portion and the trough portion can form refraction to the ray, realizes the effect of spotlight to guarantee the membrane normal function that adds lustre to.
Drawings
Fig. 1 is a schematic structural view of the structure of the fingerprint backlight under the screen of the present invention.
Fig. 2 is a schematic structural diagram of a first embodiment of the present invention.
Fig. 3 is a schematic structural diagram of a second embodiment of the present invention.
Fig. 4 is a schematic structural diagram of a third embodiment of the present invention.
Detailed Description
In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. The preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.
As shown in fig. 1, the fingerprint backlight structure under the screen of the present invention mainly includes a reflective film 1, a light guide plate 2, a diffusion film 3, and a brightness enhancement film 4 stacked from bottom to top. Wherein, the brightness enhancement film 4 is provided with a microstructure surface.
Referring to fig. 2, in a first embodiment of the present invention, the microstructure surface includes a crest portion 5 and a trough portion 6. Wherein, crest portion 5 forms the plane parallel with the horizontal direction, and trough portion 6 forms the dentate recess that has an contained angle, and the contained angle of trough portion 6 forms 60 ~ 120. When light enters the microstructure surface from the light incident side, the light irradiated on the wave crest part 5 can vertically pass through without refraction, so that the infrared light direction of the part is ensured not to be changed, and the fingerprint imaging quality is improved. The two bevel edges forming the wave trough part 6 can refract light, thereby realizing the collection of the light and ensuring the function of the brightness enhancement film 4.
Referring to fig. 3, in a second embodiment of the present invention, the microstructure surface includes a crest portion 5 and a trough portion 6. Wherein, the wave trough part 6 forms a plane parallel to the horizontal direction, the wave crest part 5 forms a dentate bulge with an included angle, and the included angle of the wave crest part 5 forms 60-120 degrees. When light enters the microstructure surface from the light incident side, the light irradiated on the wave trough part 6 can vertically pass through without refraction, so that the infrared light direction of the part is ensured not to be changed, and the fingerprint imaging quality is improved. The two bevel edges forming the wave crest part 5 can refract light, thereby realizing the collection of the light and ensuring the function of the brightness enhancement film 4.
Referring to fig. 4, in a third embodiment of the present invention, the microstructure surface includes a crest portion 5 and a trough portion 6. Wherein, crest portion 5 and trough portion 6 all form into the plane parallel with the horizontal direction, are equipped with between crest portion 5 and the trough portion 6 and are connected the face 7 that is an contained angle with the horizontal direction, should connect the face 7 and be an contained angle with the horizontal direction. When light rays enter the microstructure surface from the light incident side, the light rays irradiating the wave crest part 5 and the wave trough part 6 can vertically pass through without refraction, so that the infrared light direction of the part is ensured not to be changed, and the fingerprint imaging quality is improved. The connecting surface 7 can refract light, thereby realizing the collection of light and ensuring the function of the brightness enhancement film 4.
In the above embodiments, the reflective film 1, the light guide plate 2, the diffusion film 3, and the brightness enhancement film 4 are preferably made of materials with high infrared transmittance, and the materials with high infrared transmittance may be made by using the prior art, which is not described herein again.
While the invention has been described in conjunction with the specific embodiments set forth above, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art in light of the foregoing description. Accordingly, it is intended to embrace all such alternatives, modifications, and variations that fall within the spirit and scope of the appended claims.
Claims (7)
1. The utility model provides a fingerprint structure in a poor light under screen, includes from bottom to top range upon range of reflection membrane, light guide plate, diffusion barrier and the membrane that adds lustre to that sets up, its characterized in that adds lustre to the membrane and is equipped with the microstructural face, the microstructural face includes crest of wave portion and the trough of wave portion that the interval set up, at least one in crest of wave portion and the trough of wave portion forms the plane parallel with the horizontal direction.
2. The structure in accordance with claim 1, wherein the wave crests are formed as a plane parallel to the horizontal direction, and the wave troughs are formed as tooth-like grooves having an included angle.
3. The structure in accordance with claim 2, wherein the included angle of the wave trough portions is 60 ° -120 °.
4. The structure in accordance with claim 1, wherein the wave trough is formed as a plane parallel to the horizontal direction, and the wave crest is formed as a tooth-like protrusion with an included angle.
5. The underscreen fingerprint backlight structure of claim 4, wherein the included angle of the crest portions is 60 ° -120 °.
6. The structure in accordance with claim 1, wherein the wave crest and the wave trough are formed as a plane parallel to the horizontal direction, and a connection surface is disposed between the wave crest and the wave trough, and the connection surface is formed as an inclined surface forming an angle with the horizontal direction.
7. The underscreen fingerprint backlight structure of any one of claims 1-6, wherein the reflection film, the light guide plate, the diffusion film, and the brightness enhancement film are all made of materials with high infrared transmittance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920666293.5U CN209746173U (en) | 2019-05-10 | 2019-05-10 | Fingerprint structure in a poor light under screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920666293.5U CN209746173U (en) | 2019-05-10 | 2019-05-10 | Fingerprint structure in a poor light under screen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209746173U true CN209746173U (en) | 2019-12-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920666293.5U Active CN209746173U (en) | 2019-05-10 | 2019-05-10 | Fingerprint structure in a poor light under screen |
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| Country | Link |
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| CN (1) | CN209746173U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111160116A (en) * | 2019-12-10 | 2020-05-15 | 青岛海信移动通信技术股份有限公司 | Intelligent terminal and under-screen fingerprint backlight positioning control method |
| CN113496137A (en) * | 2020-03-18 | 2021-10-12 | 杭州海康威视数字技术股份有限公司 | Fingerprint identification device and entrance guard terminal |
-
2019
- 2019-05-10 CN CN201920666293.5U patent/CN209746173U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111160116A (en) * | 2019-12-10 | 2020-05-15 | 青岛海信移动通信技术股份有限公司 | Intelligent terminal and under-screen fingerprint backlight positioning control method |
| CN113496137A (en) * | 2020-03-18 | 2021-10-12 | 杭州海康威视数字技术股份有限公司 | Fingerprint identification device and entrance guard terminal |
| CN113496137B (en) * | 2020-03-18 | 2023-07-14 | 杭州海康威视数字技术股份有限公司 | Fingerprint identification device and access control terminal |
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